初始提交
This commit is contained in:
188
Project/Src/rt-thread/libcpu/mips/loongson_1b/interrupt.c
Normal file
188
Project/Src/rt-thread/libcpu/mips/loongson_1b/interrupt.c
Normal file
@@ -0,0 +1,188 @@
|
||||
/*
|
||||
* File : interrupt.c
|
||||
* This file is part of RT-Thread RTOS
|
||||
* COPYRIGHT (C) 2006 - 2011, RT-Thread Development Team
|
||||
*
|
||||
* The license and distribution terms for this file may be
|
||||
* found in the file LICENSE in this distribution or at
|
||||
* http://www.rt-thread.org/license/LICENSE
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2010-10-15 Bernard first version
|
||||
* 2010-10-15 lgnq modified for LS1B
|
||||
* 2013-03-29 aozima Modify the interrupt interface implementations.
|
||||
*/
|
||||
|
||||
#include <rtthread.h>
|
||||
#include <rthw.h>
|
||||
#include "ls1b.h"
|
||||
|
||||
#define MAX_INTR 32
|
||||
|
||||
extern rt_uint32_t rt_interrupt_nest;
|
||||
rt_uint32_t rt_interrupt_from_thread;
|
||||
rt_uint32_t rt_interrupt_to_thread;
|
||||
rt_uint32_t rt_thread_switch_interrupt_flag;
|
||||
|
||||
static struct rt_irq_desc irq_handle_table[MAX_INTR];
|
||||
void rt_interrupt_dispatch(void *ptreg);
|
||||
void rt_hw_timer_handler();
|
||||
|
||||
static struct ls1b_intc_regs volatile *ls1b_hw0_icregs
|
||||
= (struct ls1b_intc_regs volatile *)(LS1B_INTREG_BASE);
|
||||
|
||||
/**
|
||||
* @addtogroup Loongson LS1B
|
||||
*/
|
||||
|
||||
/*@{*/
|
||||
|
||||
static void rt_hw_interrupt_handler(int vector, void *param)
|
||||
{
|
||||
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will initialize hardware interrupt
|
||||
*/
|
||||
void rt_hw_interrupt_init(void)
|
||||
{
|
||||
rt_int32_t idx;
|
||||
|
||||
/* pci active low */
|
||||
ls1b_hw0_icregs->int_pol = -1; //must be done here 20110802 lgnq
|
||||
/* make all interrupts level triggered */
|
||||
(ls1b_hw0_icregs+0)->int_edge = 0x0000e000;
|
||||
/* mask all interrupts */
|
||||
(ls1b_hw0_icregs+0)->int_clr = 0xffffffff;
|
||||
|
||||
rt_memset(irq_handle_table, 0x00, sizeof(irq_handle_table));
|
||||
for (idx = 0; idx < MAX_INTR; idx ++)
|
||||
{
|
||||
irq_handle_table[idx].handler = rt_hw_interrupt_handler;
|
||||
}
|
||||
|
||||
/* init interrupt nest, and context in thread sp */
|
||||
rt_interrupt_nest = 0;
|
||||
rt_interrupt_from_thread = 0;
|
||||
rt_interrupt_to_thread = 0;
|
||||
rt_thread_switch_interrupt_flag = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will mask a interrupt.
|
||||
* @param vector the interrupt number
|
||||
*/
|
||||
void rt_hw_interrupt_mask(int vector)
|
||||
{
|
||||
/* mask interrupt */
|
||||
(ls1b_hw0_icregs+(vector>>5))->int_en &= ~(1 << (vector&0x1f));
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will un-mask a interrupt.
|
||||
* @param vector the interrupt number
|
||||
*/
|
||||
void rt_hw_interrupt_umask(int vector)
|
||||
{
|
||||
(ls1b_hw0_icregs+(vector>>5))->int_en |= (1 << (vector&0x1f));
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will install a interrupt service routine to a interrupt.
|
||||
* @param vector the interrupt number
|
||||
* @param new_handler the interrupt service routine to be installed
|
||||
* @param old_handler the old interrupt service routine
|
||||
*/
|
||||
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
|
||||
void *param, const char *name)
|
||||
{
|
||||
rt_isr_handler_t old_handler = RT_NULL;
|
||||
|
||||
if (vector >= 0 && vector < MAX_INTR)
|
||||
{
|
||||
old_handler = irq_handle_table[vector].handler;
|
||||
|
||||
#ifdef RT_USING_INTERRUPT_INFO
|
||||
rt_strncpy(irq_handle_table[vector].name, name, RT_NAME_MAX);
|
||||
#endif /* RT_USING_INTERRUPT_INFO */
|
||||
irq_handle_table[vector].handler = handler;
|
||||
irq_handle_table[vector].param = param;
|
||||
}
|
||||
|
||||
return old_handler;
|
||||
}
|
||||
|
||||
void rt_interrupt_dispatch(void *ptreg)
|
||||
{
|
||||
int irq;
|
||||
void *param;
|
||||
rt_isr_handler_t irq_func;
|
||||
static rt_uint32_t status = 0;
|
||||
rt_uint32_t c0_status;
|
||||
rt_uint32_t c0_cause;
|
||||
volatile rt_uint32_t cause_im;
|
||||
volatile rt_uint32_t status_im;
|
||||
rt_uint32_t pending_im;
|
||||
|
||||
/* check os timer */
|
||||
c0_status = read_c0_status();
|
||||
c0_cause = read_c0_cause();
|
||||
|
||||
cause_im = c0_cause & ST0_IM;
|
||||
status_im = c0_status & ST0_IM;
|
||||
pending_im = cause_im & status_im;
|
||||
|
||||
if (pending_im & CAUSEF_IP7)
|
||||
{
|
||||
rt_hw_timer_handler();
|
||||
}
|
||||
|
||||
if (pending_im & CAUSEF_IP2)
|
||||
{
|
||||
/* the hardware interrupt */
|
||||
status = ls1b_hw0_icregs->int_isr;
|
||||
if (!status)
|
||||
return;
|
||||
|
||||
for (irq = MAX_INTR; irq > 0; --irq)
|
||||
{
|
||||
if ((status & (1 << irq)))
|
||||
{
|
||||
status &= ~(1 << irq);
|
||||
|
||||
irq_func = irq_handle_table[irq].handler;
|
||||
param = irq_handle_table[irq].param;
|
||||
|
||||
/* do interrupt */
|
||||
irq_func(irq, param);
|
||||
|
||||
#ifdef RT_USING_INTERRUPT_INFO
|
||||
irq_handle_table[irq].counter++;
|
||||
#endif /* RT_USING_INTERRUPT_INFO */
|
||||
|
||||
/* ack interrupt */
|
||||
ls1b_hw0_icregs->int_clr |= (1 << irq);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (pending_im & CAUSEF_IP3)
|
||||
{
|
||||
rt_kprintf("%s %d\r\n", __FUNCTION__, __LINE__);
|
||||
}
|
||||
else if (pending_im & CAUSEF_IP4)
|
||||
{
|
||||
rt_kprintf("%s %d\r\n", __FUNCTION__, __LINE__);
|
||||
}
|
||||
else if (pending_im & CAUSEF_IP5)
|
||||
{
|
||||
rt_kprintf("%s %d\r\n", __FUNCTION__, __LINE__);
|
||||
}
|
||||
else if (pending_im & CAUSEF_IP6)
|
||||
{
|
||||
rt_kprintf("%s %d\r\n", __FUNCTION__, __LINE__);
|
||||
}
|
||||
}
|
||||
|
||||
/*@}*/
|
||||
Reference in New Issue
Block a user